Preheat your oven to 400°F and generously spray a muffin tin with cooking spray.
Halve 3 of the turkey slices, then line 6 cavities of the muffin tray with 1½ slices of turkey meat each. Try to cover the cavity completely, with no holes.
Place 1 tablespoon of grated cheese and ½ tablespoon of diced green onion into the center of each muffin cavity.
In a large bowl, whisk together the eggs, egg whites, and Buffalo sauce. Season with a pinch of salt and pepper.
Divide the egg mixture between the muffin cups, filling almost to the top.
Bake for 15-18 minutes, until the eggs are set and have puffed up.
Drizzle with more Buffalo sauce, if desired, and DEVOUR.